Improvement in scaffolds



UNITED JOHN MURRAY, OF BRUNSWICK, MAINE.

IMPROVEMENT EN SCAFFGLDS.

Specification forming part of Letters PatentNo. E5 g, dated May 19, 1874applica tion filed March 2e, 1874.

To all whom it may concern:

Beitkuown that I, JOHN MURRAY, of Brunswick, in the county of Cumberlandand State of Maine, have invented anew and valuable Inlprovement inBuilders7 and Painters7 Staging 5V and I do hereby declare that thefollowing is a full, clear, and exact description ofthe construction andoperation of the saine, reference being had to the annexed drawings,making a part ot' this specification, and to the letters and gures ofreference marked thereon.

Figure 1 of the drawings is a representation of a sectional view of mystaging. Fig. 2 is a front, and Figs. 3 detail, views of the saine.

This invention has relation to stages or supports for painters andbuilders; and it consists in combining, with extension -ladders andhinged props therefor, a horizontal stage or platform and adjustablesupports, as will be hereinafter explained.

In the annexed drawings, A A designate the lower portions of twoextension-ladders; and a a are the sliding sections, which are connectedto the lower sections by means of clasps c c, and sustained at differentheights by means ot' hooks d cl. B B designate eXtension prop-ladders,which are respectively composed of twosections put together, andsustained by hooks and clasps, as described forthe main ladders A A. Theupper ends ofthe upper prop-sections are connected to the upper endsofthe lower sect-ions of the main ladders by hinges or pivots p,- sothat the base of each ladder can be extended or contracted, ascircumstances require. To prevent the lower ends ofthe ladders and propsfrom spreading when erected, I employ tie-bars or braces c c, havinghooked ends, which are hooked over the rounds of the main ladders andtheir props, as shown in Fig. 2. To prevent the ladders and props fromfalling laterally, I employ in clined props g g, which are hooked to thelower section of the main ladders and spiked to the ground. These propsare detachable from their ladders. O designates a horizontal stage,which may be of any suitable length and width, and which is designed toafford a support for persons working on a building. rIhe ends of thestage are sustained bymeans of cross-bars It li, which are supportedupon the rounds of t-he ladders and their props, and which may belocated at different heights from the ground. rIhis stage O is alsosupported at the middle of its length by means of an adjustable pin, t,applied to a vertical post,l D, which latter passes through the stage,and rests upon the ground between th e ladders. prevent the stage fromsagging, and will hold it steady when persons are at work on it.

Then the ladders are not in use, they can be shortened and folded into asniall compass for transportation.

lVhat I claim as new, and desire to secure by Letters Patent, is-

The vertically-adjustable stage O, supported by erossbars h 7L on therounds of ladders, and by an intermediate post, D, in combination withfolding ladders and props, substantially as and for the purposesdescribed. Y

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

JOHN MURRAY. lllitnesses N. T. WVORTHLEY, J. H. LOMBARD.

rIhis post D will

